All NFTs are stored on IPFS (https://ipfs.io) and minted on the Stacks Blockchain (https://www.stacks.co/) using the SIP-009 Standard (https://github.com/stacksgov/sips/blob/main/sips/sip-009/sip-009-nft-standard.md). Stacks enables smart contracts on the Bitcoin blockchain ( https://bitcoin.org/bitcoin.pdf). A public link to the blockchain record is provided with every NFT transaction.